What are some alternatives?
When comparing Tilt Brush by Google and SprayPrinter, you can also consider the following products
Snap Art - Snap's augmented reality platform
VR Sketch - A tool for designers to draw inside virtual reality
MasterpieceVR - Powerful VR sculpting & painting tool
AI Painter - Turn your photos into paintings
Blocks by Google - Easily create 3D objects in VR
A-Painter - Paint in VR in your Browser